<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Document</title>
        <style>
            * {
                padding: 0;
                margin: 0;
            }

            body {
                font-size: 0;
            }

            body>* {
                font-size: 16px;
            }

            .a {
                width: 200px;
                height: 200px;
                background: red;
                display: inline-block;
            }

            .b {
                width: 200px;
                height: 200px;
                background: yellow;
                display: inline-block;
            }

            a {
                width: 200px;
                height: 200px;
                background: red;

            }

        </style>
    </head>
    <body>

        <div class="a"></div>
        <div class="b"></div>
        <a href="">你好</a>

        
    </body>
</html>